Add support PostCSS extensions (.sss, .pcss, .postcss)

[shashkovdanil]

No description provided.

[shashkovdanil]

cc @timneutkens

[shashkovdanil]

cc @timneutkens

[timneutkens]

I don't think we should add this.

[shashkovdanil]

@timneutkens, why? It does not break anything, it just gives you the opportunity to use SugarSS in the project.

[ai]

@timneutkens .pcss is official extension PostCSS (when you use plugins with custom syntax). GitHub and many IDEs (or text editor plugins) support it.

[shashkovdanil]

cc @timneutkens, @iamstarkov

[iamstarkov]

I can see a benefit in adding support for postcss, either it is done by adding support for it in next-css or as an extra plugin

[pajasevi]

+1 for this PR, it would really help with syntax highlighting and it does not break anything.

[timneutkens]

I'm going to close this in favor of vercel/next.js#8626

Thanks for your contribution 🙏